Officers searched the adjoining buildings and discovered 21-year-old Adrian Victor Torres, a former student, deceased inside a locker room shower stall in Building “F” from what appeared to be a self-inflicted gunshot wound.

One student spoke with WFAA and said she was in the C Building when she heard three gunshots before running out of the school.

Another witness said officers with high-powered rifles were going room to room searching for the suspect.

Building C at North Lake College

A student named Mike said he heard people yelling in a hallway, and a man entered the room he was in, turned off the lights, and locked the door. He also heard police officers telling people to get down, and said officers entered the room and had students leave with their hands over their heads.

Other witnesses spoke with WFAA's Sebastian Robertson and shared their encounters:

The Irving Independent School District says nearby Singley Academy and MacArthur High School are no longer under lockdown, but there was never a known threat to either campus.